How much plot is too much?

So...maybe I've been trying to bust out an unintended sequel to that magic sex thing that I wrote a while back.  And that sequel sprouted a plot. 

But how much is too much?

I swear, I really super wish I could tell when enough is enough. Because not only do I have a plot, I have alternate plots, and side plots. It's like I'm going to have pizza for dinner, right, except that pizza could be one of three different flavors, and maybe it's a calzone or it comes with garlic cheese sticks that seem like a good idea when you're hungry but then you fill up on breadsticks and you never end up getting the pizza.

That wasn't really an accurate analogy, but I think you get the point.

I'm struggling I guess because I'm editing the possibilities down, but they all seem like good ideas! I know I can't fit them all in without hurting the story as a whole. And even as I try to narrow it down, I get even more ideas, alternates of alternates. (Granted, I'm kind of pleased to have a concrete plot. I tend to either get a billion plot ideas for the same story or go into the story with no plot in mind at all and then struggle to think of what the characters will do.)

(Also, I clearly must be getting older cause it feels like I wrote the first story so recently, but it's been a year and change, hahahah. I always have things on the back burner, I guess. Must come from having a bunch of WIPs that I feel guilty about not finishing....yet.)

I'm going to go back to trying to hammer it out, and maybe, just maybe, flesh a little bit out.

~later